Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 8/20/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 08/20/2025 | 22:12:03 | 70.10,-156.71 | 57.94 | 08/20/2025 | 22:13:10 | 70.11,-156.79 | 57.94 | 3.13 | 67 |
| 2 | 08/20/2025 | 23:02:46 | -70.04, 10.71 | 122.12 | 08/20/2025 | 23:02:39 | -70.05, 10.76 | 122.11 | 2.34 | 7 |
| 3 | 08/20/2025 | 23:53:23 | 69.58, 178.70 | 57.42 | 08/20/2025 | 23:52:12 | 69.62, 177.81 | 57.50 | 34.90 | 71 |
| 4 | 08/23/2025 | 14:28:58 | 70.11, -40.95 | 58.85 | 08/23/2025 | 14:29:40 | 70.08, -40.94 | 58.82 | 3.07 | 42 |
| 5 | 08/23/2025 | 15:19:40 | -69.99, 126.54 | 121.27 | 08/23/2025 | 15:19:10 | -69.97, 126.53 | 121.29 | 2.53 | 30 |
| 6 | 08/26/2025 | 05:55:23 | -70.94, -93.82 | 119.38 | 08/26/2025 | 05:56:30 | -70.86, -91.56 | 119.53 | 83.07 | 67 |
| 7 | 08/26/2025 | 06:45:52 | 70.07, 74.88 | 59.73 | 08/26/2025 | 06:46:10 | 70.04, 74.88 | 59.69 | 3.36 | 18 |
| 8 | 08/26/2025 | 07:36:34 | -69.95,-117.62 | 120.39 | 08/26/2025 | 07:35:40 | -69.93,-117.64 | 120.41 | 2.43 | 54 |
| 9 | 08/28/2025 | 22:12:02 | -70.12, 23.26 | 119.30 | 08/28/2025 | 22:13:12 | -70.15, 23.27 | 119.28 | 2.72 | 70 |
| 10 | 08/28/2025 | 23:02:46 | 70.04,-169.30 | 60.63 | 08/28/2025 | 23:02:39 | 70.04,-169.23 | 60.63 | 2.33 | 7 |
| 11 | 08/28/2025 | 23:53:24 | -69.71, -1.48 | 119.71 | 08/28/2025 | 23:52:12 | -69.77, -1.98 | 119.63 | 20.35 | 72 |
| 12 | 08/31/2025 | 14:28:55 | -70.09, 139.09 | 118.38 | 08/31/2025 | 14:29:41 | -70.08, 139.06 | 118.40 | 2.04 | 46 |
| 13 | 08/31/2025 | 15:19:38 | 69.95, -53.39 | 61.50 | 08/31/2025 | 15:19:08 | 69.97, -53.45 | 61.51 | 2.59 | 30 |
| 14 | 09/03/2025 | 05:55:21 | 70.92, 86.22 | 63.45 | 09/03/2025 | 05:56:28 | 70.80, 88.39 | 63.28 | 80.14 | 67 |
| 15 | 09/03/2025 | 06:45:49 | -70.07,-105.10 | 117.43 | 09/03/2025 | 06:46:10 | -70.04,-105.10 | 117.46 | 2.38 | 21 |
| 16 | 09/03/2025 | 07:36:32 | 69.93, 62.42 | 62.44 | 09/03/2025 | 07:35:37 | 69.93, 62.38 | 62.45 | 1.45 | 55 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/20/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/20/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9